Firsthoch/Firstoffen - Costs for extras

  • Erstellt am 2020-05-08 21:49:15

PyneBite

2020-05-08 21:49:15
  • #1
Hello everyone,

we have an appointment with the architect coming up soon. To pass the time, we have had conversations with one or two general contractors.

I am very surprised by the following statements:

1) For a gable roof without eaves, a solid knee wall must be constructed - additional cost 12k
2) Ridge height/open ridge means a lot more insulation material - additional cost 9k
3) A small "T"-shaped wall in the bathroom costs an extra 3k

The first point surprises me a lot. How is the knee wall constructed in a house with roof overhang? We had discussed a knee wall of about 140 cm here. Unfortunately, I forgot to ask this question there, so I am looking for an answer over the weekend.

I find the extra costs for points 2 and 3 somewhat exaggerated. However, I can understand that it generally costs more.

Unfortunately, our appointment with the architect is still pending, so I am trying to clarify many questions in advance.

Kind regards!
 

hampshire

2020-05-09 10:44:01
  • #2
The vectors of the load distribution of the roof have different angles, so you also need different static calculations. A gable roof without overhangs is stylish and at the same time less functional. It's not just the insulation material, but also a different requirement for surface treatment. For a high room, I recommend acoustic elements on the ceiling. We installed Ligno Trend - but that doesn't make it cheaper. Just a sheeted stud frame or wood frame construction? With plastering and tiles? Is there any installation going in it? Does the T have to bear loads? Is it ceiling-high or does it have to stand on its own? Depending on that, 3k can be expensive or a bargain.
 

hausnrplus25

2020-05-09 21:46:09
  • #3
Regarding point 2)
we have an offer to open only one eaves side ridge-high and that would be 4.5k (then including raising the walls). So 9k for the entire opening seems reasonable to me.
 

11ant

2020-05-09 21:53:29
  • #4
I can’t make sense of this: a solid knee wall under a certain condition otherwise implies no solid knee wall; the knee wall is supposed to be 140 cm. Assuming the terms are used correctly) - then a knee wall despite 140 cm knee wall is surprising; assuming you mean the same thing by knee wall and knee wall here) - then the knee wall would be the knee wall, i.e. the continued exterior wall (which would always be load-bearing, whether built of masonry or timber). With a knee wall, the wall plate rests on it. Without roof overhang, the wall plate is not merely a support for the rafters, but the rafter ends also rest there. The knee wall would have to be effectively a ring beam at the same time. From "firstoffen" I deduce that there should be no collar beam in this scenario either. Please clarify what is planned here.
 

PyneBite

2020-05-10 21:13:23
  • #5
This statement puzzled me afterward as well. I also don’t know what a non-solid knee wall is. I will follow up on this Monday.
 

11ant

2020-05-10 21:31:08
  • #6
But you could already clarify whether a knee wall and a dwarf wall are seriously supposed to be connected in series here.
 

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